Cook, CEO of Apple Inc., speaks at education-focused event in Chicago Tim Cook, Chief Executive Officer of Apple Inc., speaks at an education-focused event at Lane Technical College Prep High School in Chicago, Illinois, U.S., March 27, 2018. REUTERS/John Gress JOHN GRESS

Foto: JOHN GRESS/REUTERS/PIXSELL/REUTERS/PIXSELL

VP of Apple's iOS, iPad and iPhone Product Marketing, Joswiak, speaks at education-focused event in Chicago Apple's Vice-President of iOS, iPad and iPhone Product Marketing, Greg Joswiak, speaks at an education-focused event at Lane Technical College Prep High School in Chicago, Illinois, U.S., March 27, 2018. REUTERS/John Gress JOHN GRESS

Foto: JOHN GRESS/REUTERS/PIXSELL/REUTERS/PIXSELL

Cook, CEO of Apple Inc., takes part in an educational focused event in Chicago Tim Cook, Chief Executive Officer of Apple Inc., takes part in an education-focused event at Lane Technical College Prep High School in Chicago, Illinois, U.S., March 27, 2018. REUTERS/John Gress JOHN GRESS